Implicit higher-order moment matching technique for model reduction of quadratic-bilinear systems     

Mian Mohammad Arsalan Asif  Mian Ilyas Ahmad  Peter Benner  Lihong Feng  Tatjana Stykel 《Journal of The Franklin Institute》2021,358(3):2015-2038

We propose a projection based multi-moment matching method for model order reduction of quadratic-bilinear systems. The goal is to construct a reduced system that ensures higher-order moment matching for the multivariate transfer functions appearing in the input-output representation of the non-linear system. An existing technique achieves this for the first two multivariate transfer functions, in what is called the symmetric form of the multivariate transfer functions. We extend this framework to an equivalent and simplified form, the regular form, which allows us to show moment matching for the first three multivariate transfer functions. Numerical results for three benchmark examples of quadratic-bilinear systems show that the proposed framework exhibits better performance with reduced computational cost in comparison to existing techniques.  相似文献   

The Effects of Socio-scientific Instruction on Pre-Service Teachers’ Sense of Efficacy for Learning and Teaching Controversial Family Health Issues     

Yahaya  Jamil Mikhail  Zain  Ahmad Nurulazam Md  Karpudewan  Mageswary 《International Journal of Science and Mathematics Education》2014,13(2):467-491

This research investigates the effects of socioscientific instruction on pre-service teachers’ sense of efficacy in the teaching and learning of controversial family health issues. For this purpose, a total of 251 students from two teacher training colleges participated in the study and were randomly assigned as experimental and control groups. The experimental group was taught the contents of the controversial family health issues using socioscientific instruction approach and the control group was taught the same content using a more traditional approach. Quantitative data were obtained from both groups after responding to the ‘Teacher sense of Efficacy Scale’ as instrument used for data collection before and after the treatments. Analysis of covariance was used in data analysis of which the pre-treatment scores were used as covariates. Qualitative interviews were conducted with ten participants randomly selected from the experimental group before and after the treatment to deepen and elaborate the quantitative data. The quantitative and qualitative findings indicate that the integration of the socioscientific instruction have significantly affected the pre-service teachers’ sense of efficacy in favour of the experimental group that shows a more stronger sense of efficacy. It was concluded that the socioscientific instruction is significantly effective in changing the pre-service teachers’ weaker sense of efficacy to a stronger one in the controversial family health issues.

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Polybutylcyanoacrylate Nanoparticles and Drugs of the Platinum Family: Last Status     

Dashti Rahmat Abadi Fatemeh  Hasan Ebrahimi Shahmabadi  Anita Abedi  Seyed Ebrahim Alavi  Fatemeh Movahedi  Maedeh Koohi Moftakhari Esfahani  Tahereh Zadeh Mehrizi  Azim Akbarzadeh 《Indian journal of clinical biochemistry : IJCB》2014,29(3):333-338

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Aging and social security system in Pakistan: policy challenges,opportunities, and role of China–Pakistan Economic Corridor (CPEC)     

Riaz Ahmad  Ren Keyao  Khalid Khan  Khan Navid 《Educational gerontology》2013,39(9):537-550

ABSTRACT

The purpose of this research is to highlight the aging and elderly care in Pakistan, a country considered the seventh most populous country in the world with an estimated population of 220 million people (citation, 2017). In 2013, Pakistan signed a MoU with China for 56 billion in US$ to create opportunities for the youngsters, but there was no story of opportunity included for the senior citizens. An attempt has been made to raise awareness of the plight of seniors to the Pakistan Government’s attention; however since there is no formal policy dedicated to elders from the Chinese mega MoU and political instability, only little has been accomplished to better the lives of older adults. Modernization has had a major impact on the life of older Pakistani, and not always a positive effect. This research focuses on the important issues that are making the lives of senior citizens more difficult. The issues include psychological factors, anxiety, physical issues, and environmental issues. The research concludes while many factors are making the lives of senior citizens problematic, seniors are still living a satisfied life because they are not depending on their children or others. Senior citizens demand and desire time with their children and grandchildren. Increases found in elders’ psychological problems are likely correlated with modernization. Unfortunately, the China–Pakistan Economic Corridor (CPEC) and the mega project remain totally for the younger population with no economic prospects for elders to directly benefit. Thus, the question remains what will be the outcome for Pakistani seniors?  相似文献   

Cognitive learning styles and digital equity: searching for the middle way     

Glenn Hardaker  Richard Dockery  A’ishah Ahmad Sabki 《International Journal of Inclusive Education》2013,17(8):777-794

This research is driven by a desire to understand the lifelong learner in the context of styles of learning and the emerging implications of technology enhanced learning for digital equity. Recognising cognitive learning styles is the first step educators need to take in order to be most effective in working with students of diversity and bridging across formal and informal settings. Learning environments as a characterising feature of learning styles have undergone unprecedented change over the past decade with learning environments now blending physical and virtual space. To support the increasing diversity of learners pedagogy has to be fair, culturally responsive, equitable and relevant to the ‘virtual generation’. This, in turn, will inform our understanding of the ‘middle way’ in recognising cognitive learning styles, associated cultural context, and the implications to digital pedagogy equity.  相似文献   

E-government implementation strategies in developed and transition economies: A comparative study     

Vishanth Weerakkody  Ramzi El-Haddadeh  Tomas Sabol  Ahmad Ghoneim  Peter Dzupka 《International Journal of Information Management》2012

In the last decade, electronic government in Europe has emerged and established itself as a viable alternative channel for public service delivery. While e-government has now matured in most developed European countries, transition economies in Europe, have only recently begun to recognise its potential benefits and incorporated e-government as part of their national strategy. Although time may result in the amplification of e-government experience for transition economy countries, lessons drawn from developed countries indicate that political, fiscal, social, strategic and organisational issues need to be addressed when formulating plans for deploying e-government. Using case study research, this paper examines strategies adopted by the UK and Slovakia in the context of e-government implementation. Particularly, the paper examines how the perspectives on e-government vision, strategy, focus and related organisational change influence the implementation and diffusion of e-government in developed and transition economies in Europe.  相似文献   

Gender and behavioural differences in Kuwait primary schools     

Yousuf Almurtaji  John Everatt  Nasser S. Almenaye  Ahmad S. Alazemi  Dalal Abdul Hadi Alradaan 《Emotional and Behavioural Difficulties》2018,23(2):141-153

Previous studies have found significant differences between the classroom behaviour of boys and girls. Most are within a single broad cultural context and little work has been done within an Arabic/Kuwaiti one. The main aim was to investigate the differences in behaviour between boys and girls in Kuwait primary schools. Data were collected that provided comparisons across questionnaires between parent and teacher returns for over 430 students. Separate teacher observations of students (n = 671) and classroom researcher observations were also obtained. Significant differences were found across the scales, indicating higher levels of externalising misbehaviour among boys than girls. A comparison with three studies conducted in other cultural contexts using the same strengths and difficulties instrument as used in this study found similarities and differences in results between the behaviour of boys and girls.  相似文献   

The impact of global and local context information on the processing of deceptive actions in game sports     

Iris Güldenpenning  Mustafa Alhaj Ahmad Alaboud  Wilfried Kunde  Matthias Weigelt 《Sportwissenschaft》2018,48(3):366-375

In basketball, the defender’s reaction to a pass is slower and more error prone if the attacking player gazes into the opposite direction. This so-called head-fake effect might be modulated by context information, that is, the frequency and the sequence of head fakes occurring. Accordingly, the present study investigates the head-fake effect for different frequency proportions (20% vs. 50% vs. 80%). The results show that the head-fake effect decreases when the head fake occurs more often. Furthermore, a potential influence of previous fake experience (i.e., congruency-sequence effect) on the size of the head-fake effect was investigated. Importantly, previous fake experience did not cause the frequency-based modulation of the general size of the head-fake effect. These findings bare important implications for sports practice, especially when it comes to instructing players about the tactical use of deceptive actions.  相似文献   

Improving the performance of networked control systems with time delay and data dropouts based on fuzzy model predictive control     

Ahmad Sakr  Ahmad M. El-Nagar  Mohammad El-Bardini  Mohammed Sharaf 《Journal of The Franklin Institute》2018,355(15):7201-7225

This paper proposes a fuzzy model predictive control (FMPC) combined with the modified Smith predictor for networked control systems (NCSs). The network delays and data dropouts are problems, which greatly reduce the controller performance. For the proposed controller, the model of the controlled system is identified on-line using the Takagi – Sugeno (T-S) fuzzy models based on the Lyapunov function. There are two internal loops in the proposed structure. The first is the loop around the FMPC, which predicts the future outputs. The other is the loop around the plant to give the error between the system model and the actual plant. The proposed controller is designed for controlling a DC servo system through a wireless network to improve the system response. The practical results based on MATLAB/SIMULINK are established. The practical results are indicated that the proposed controller is able to respond the networked time delay and data dropouts compared to other controllers.  相似文献   

Association of Vitamin D Receptor (FokI and BsmI) Gene Polymorphism with Bone Mineral Density and Their Effect on 25-Hydroxyvitamin D Level in North Indian Postmenopausal Women with Osteoporosis     

Israr Ahmad  Tabrez Jafar  Farzana Mahdi  Md. Arshad  Siddharth Kumar Das  Shah Waliullah  Abbas Ali Mahdi 《Indian journal of clinical biochemistry : IJCB》2018,33(4):429-437

Osteoporosis is a systemic disease with a strong genetic component. Vitamin D receptor (VDR) has been suggested as a candidate gene for osteoporosis. Therefore the present study was aimed to investigate the pattern of allelic variants of VDR gene polymorphism (FokI and BsmI), its influence on vitamin D levels and bone mineral density (BMD) in North Indian postmenopausal women with osteoporosis for possible genetic association. 254 postmenopausal osteoporotic women and 254 postmenopausal non osteoporotic women were included in the study. VDR FokI and BsmI gene polymorphism gene were assessed by the PCR-RFLP method. Serum 25-hydroxyvitamin D was measured by the ELISA. BMD at the L₁–L₄ lumbar spine, hip, forearm and femoral neck was assessed by dual energy X-ray absorptiometry. The average BMD at spine and hip in postmenopausal women with bb and spine, hip, femoral neck and forearm with ff genotype had significantly low BMD. The frequency of ff genotype and f allele was significantly higher in postmenopausal osteoporotic women when compared with postmenopausal non osteoporotic women. However, no significant association was found between the genotypes and vitamin D levels. Our study reveals that VDR gene FokI and BsmI polymorphism is significantly associated with low bone mineral density. Therefore the ff genotype and f allele of VDR FokI gene may be used as an important risk factor for osteoporosis.  相似文献